[求助] 关于51单片机小程序的问题

就说忘了 2014-7-19 22:06 楼主

我写的这个程序是  在4*4键盘上通过按前三个键，来控制自加的函数  暂停和清零但是按键始终不起作用；这是为什么我刚学。大神给看一看.
这是程序
#include
unsigned char duan_xuan[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char wei_xuan[]={0xfe,0xfd,0xfb,0xf7,0xef,0xbf,0xdf,0x7f};
char temp,key;
int m,n,l,s;
void delay(unsigned int i)
{
unsigned int j;
while(i--)
{
for(j=0;j<125;j++)
{
;
}
}
}
void key_scan()
{

{
if(temp!=0xf0)
   {
      delay(10);
if(temp!=0xf0)

{
        switch(P1)
   {
      case 0xee:    //0按下//
key=0;
break;
case 0xde:
key=1;
break;
case 0xbe:
key=2;
break;
   }

}
   }

}

}

void display(int s)

{
switch (key)
{
case 0:
for(s=0;s<1000;s++)

{

m=s/100;    // 显示要求数字
n=s%100/10;
l=s%10;
P2=wei_xuan[2];
P0=duan_xuan[m];
delay(1);
P2=wei_xuan[1];
P0=duan_xuan[n];
delay(1);
P2=wei_xuan[0];
P0=duan_xuan[l];
delay(1);
if(key==1)
{
break;
}
   }
   break;

case 1:
while(1)
   {
     P2=wei_xuan[2];
P0=duan_xuan[m];
delay(1);
P2=wei_xuan[1];
P0=duan_xuan[n];
delay(1);
P2=wei_xuan[0];
P0=duan_xuan[l];
delay(1);
     if(key==2) break;
}
   break;
case 2:
while(1)
{
P2=wei_xuan[2];
P0=duan_xuan[0];
delay(1);
P2=wei_xuan[1];
P0=duan_xuan[0];
delay(1);
P2=wei_xuan[0];
P0=duan_xuan[0];
delay(1);
}
break;
   }
}
void main()
{
      while(1)
{
     key_scan();
display(key);
}
}

回复评论（6）

沙发常见泽1

keypeizhiyinjiaole???

点赞 2014-7-21 13:37

板凳曾经in

switch(P1)
                              {
                                                case 0xee:          //0按下//这里不是0xef?下面也是
                                                      key=0;
                                                      break;
                                             case 0xde:
                                                      key=1;
                                                      break;
                                             case 0xbe:
                                                      key=2;
                                                      break;
                                 }

点赞 2014-7-21 19:53